package Jama.util;

public class Maths {

	/**
	 * sqrt(a^2 + b^2) without under/overflow. *
	 */

	public static double hypot(double a, double b) {

		double r;

		if (Math.abs(a) > Math.abs(b)) {

			r = b / a;

			r = Math.abs(a) * Math.sqrt(1 + r * r);

		}
		else if (b != 0) {

			r = a / b;

			r = Math.abs(b) * Math.sqrt(1 + r * r);

		}
		else {

			r = 0.0;

		}

		return r;

	}

}

